The rule about winmail.dat files is explained 
in the Statalist FAQ, which all, novices or 
not, should read carefully before posting to 
Statalist. A Google on winmail.dat will
prove enlightening.
It is possible, although unlikely, that 
your predict.ado file is corrupt. 
You need to do something like this: 
. use auto
. set trace on 
. regress mpg weight 
. predict rs, rstudent 
and see where the error message you get
is produced. 
Nick 
[email protected] 
Alice (Libo) Sun
 
> Thanks for the quick response. I am a novice here.
> Yes, I am using -regress- command. Could that be something 
> wrong with predict ado file in my computer?
> 
> " Incidentally, please don't send your winmail.dat
> file to Statalist. "
> 
> What do you mean? Should not I send email to the Statlist? 
 
Nick Cox
 
> I can't reproduce this. With Stata 7 and the auto
> data I can go 
> 
> regress mpg weight 
> predict rs, rstudent 
> 
> Are you using -regress-? 
> 
> Incidentally, please don't send your winmail.dat
> file to Statalist. 
> 
> Nick 
> [email protected] 
> 
> Alice(Libo) Sun
>  
> > I am using stata 7.0.  Stata returns error message 
> "rstudent invalid" when I type "predict rstud, rstudent" 
> after regression.
> > 
> > Any hint on how to fix it? 
> > 
> > I checked my ado files update status. All updated to 05 Dec 2002. 
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